A "shark whisperer" scuba guide in Key Largo loves to kiss nurse sharks until one bites his pursed lips.
Expert Jeff Kurr commented the accident: "A lot of attacks are silly, people doing dumb things. You just have to have a lot of respect for the animal. They have a lot of power. They're great predators."
For one week each year, the Discovery channel devotes its entire network to exploring humans' long-standing fascination with sharks.
The video below captured the accident.